/*
 * (#)FilterSecurityInterceptor.java 1.0  2013年7月15日 GMT+08:00
 */
package com.newtouch.web.security;

/**
 * @author 凌蒙
 * @version V1.0, 2013年7月15日 GMT+08:00
 * @since JDK1.6
 */
import org.apache.log4j.Logger;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;
public class FilterSecurityInterceptor extends AbstractSecurityInterceptor implements Filter {
	/**
	 * Logger for this class
	 */
	private static final Logger logger = Logger.getLogger(FilterSecurityInterceptor.class);
	private FilterInvocationSecurityMetadataSource securityMetadataSource;
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		if (logger.isDebugEnabled()) {
			logger.debug("doFilter(ServletRequest, ServletResponse, FilterChain) - start"); 
		}
		FilterInvocation fi = new FilterInvocation(request, response, chain);
		invoke(fi);
		if (logger.isDebugEnabled()) {
			logger.debug("doFilter(ServletRequest, ServletResponse, FilterChain) - end"); 
		}
	}
	public FilterInvocationSecurityMetadataSource getSecurityMetadataSource() {
		return this.securityMetadataSource;
	}
	public Class<? extends Object> getSecureObjectClass() {
		return FilterInvocation.class;
	}
	public void invoke(FilterInvocation fi) throws IOException, ServletException {
		InterceptorStatusToken token = super.beforeInvocation(fi);
		try {
			fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
		} finally {
			super.afterInvocation(token, null);
		}
	}
	@Override
	public SecurityMetadataSource obtainSecurityMetadataSource() {
		return this.securityMetadataSource;
	}
	public void setSecurityMetadataSource(FilterInvocationSecurityMetadataSource securityMetadataSource) {
		this.securityMetadataSource = securityMetadataSource;
	}
	public void destroy() {
		
	}
	public void init(FilterConfig filterconfig) throws ServletException {
		
	}
}
